5 of the most common locks used in London
July 29, 2025
A quick look at 5 of the most common locks used on residential properties in London.
In London you will not find a residential property that does not utilize door locks . The city is simply not safe enough to not utilize door locks, whether it be on bathrooms, front doors or even cupboards. The sheer number of people means you need to lock a door to ensure your privacy. Door locks are an essential part of any residential space, and they are part of the building blocks for safety and security.
Most people are aware of this, but not many are knowledgeable when it comes to door lock types. Despite using the locks as much as using the fridge, most residents in the property won't remember what their lock looks like. In addition selecting the appropriate door lock from available door lock types is important. The reason is simple, some locks work better in one situation than they do in others. A basic understanding of residential door lock types will help homeowners and property managers choose the best locks to use at all times. If you happen to be locked out at the time of reading this article it may help you identify the type of lock you have, this way you can tell the Locksmith and get a more accurate quote.
In the above image we have provided a clear view of the most common lock used on front doors in London. They come in many different colours and a few different shapes and sizes but they all operate the same way. A key from the outside and a handle from the inside. When the cylinder and back case are put together they are considered a " Nightlatch ". These are easy to use and don't require you to lock your door each time you leave the property.
There are three levels of security when it comes to these locks, deadlocking, non deadlocking & autodeadlocking.
The above image is a deadlocking version. this means you can turn the key from the outside of the property twice to double lock the latch, thus stopping burglars from slipping your lock. The above lock is also available in a non deadlocking version for fire doors/ HMO's for quick escape and would look very similar.
Mortice locks (Often referred to as Chubb locks ) being among the most common are by far one of the most reliable locks for security, coupled with reasonable prices it makes them a no brainer. They require a key to operate both from the inside and from the outside. Sometimes your insurer will require you to install BS deadlock on the doors of your property as these are so reliable and difficult to open without a key even for Locksmiths. As there are a few different levels of security involved in Mortice deadlock locks its best to check that they have 5 levers at least. Bedroom door locks often utilize 3 lever deadlocks which are similar in terms of design but the security of the two doesn't compare.
Reliable, long lasting and very hard to open without a key, you also can't lock yourself out by mistake as you have to have the key to lock the door, whats not to love?
High security Auto Deadlocking Nightlatch.
These are fairly common but no-where near as the regular basic nightlatches. These come in a variety of forms
If you are replacing the nightlatch we advise to switch to either the High Security Auto Deadlock certificated to BS 3621:2007+A1:2009 Thief resistant lock assembly. Key egress. Or tocertificated to BS 8621:2007+A1:2009 Thief resistant lock assembly. Keyless egress. This will depend on whether the door is a communal door or not. Locks like this will be marked by the British Standard Kitemark. This is the latest version of BS 3621, but insurers will most likely still accept locks certificated to the previous version, BS 3621:2004 or earlier versions, always best to check with your insurer. These higher quality rim night-latches will sometimes have a flat ended latching bolt which is thrown into the keep as the door closes such as th Banham L2000 Rim Nightlatch . The first version of locks listed are not suitable for communal doors because of means of escape issues this is why its best to use the BS 8621:2007 .
If you are replacing the nightlatch and you share the main entrance door with another household fit one that is certificated to BS 8621:2007+A1:2009 Thief resistant lock assembly Keyless egress. These nightlatches have the same security attributes as ones certificated to BS 3621 but operate from the inside without the use of a key.
We love installing these so feel free to contact us to discuss your options.
Multipoint locks are available in a variety of designs, but generally include a centrally located deadbolt and a live bolt (latch), at least two hook bolts and possibly a pair of roller bolts or mushrooms. The bolts are normally operated by lifting the door handle from either side of the door leaf and are locked in place by the turn of a key from either face of the door or, if the door is the only means of escape, by an internal thumbturn. Some versions have additional bolting into the top and bottom frames and even into the hinge side of the frame. There are others that automatically engage all the bolts as the door closes, but these tend to be a lot more expensive.
On many council properties these locks are used, they utilise a MulTlock type mechanism which only engages when the key is turned, however the outside handle only serves to pull or push the door.
Lots of people are not using a multi-point locking door correctly and this is leading to thousands of unnecessary burglaries each year, the handle must be lifted fully, the key must be turned completely and then removed. If the handle goes down fully the cylinder hasn't engaged the mechanism and locked it properly, it can be opened from within with hook very easily.
Cylinder locks are locks using a cylinder and pins. The cylinder normally has a round whole that consist an inner smaller tube with pins. The pins prevents prevents movement of the tube unless the right key is inserted. Some common cylinder locks are rim and euro locks. Cylinder Locks are the most commonly recognised type of pin tumbler lock. This means that the lock mechanism uses pins of varying lengths to prevent the lock opening if the wrong key is being used.
The greatest advantage of using cylinders locks over lever locks is the number of key differs available. There are millions of key differs available which allows extensive master key systems as well as a high degree of key security for thousands of locks.
They are very easy to remove and install. The most important part of the process is in the preparation. The shape of the replacement Euro cylinder is inconsequential because all Euro cylinders have the same dimensions. The preparation required is a measurement of your current lock. To gather the correct measurements record the length from the center screw to each end of the cylinder. Do not measure the entire length of the lock. The length will be different on either side of the cam.
We have mentioned lock snapping on one of our previous posts this where you access the protruding end of a Euro cylinder and grip it with a tool. Shake the lock until it snaps in half. Remove the lock. Access the boltwork and open the door. The weak point in Euro Cylinders is the metal right beneath the fixing hole. Once the lock is broken, the door can be opened very easily.
The best way to prevent lock snapping is by buying installing anti snap locks. Having the lock face flush against the faceplate is not enough. That leverage can be as simple as a hearty shake from side to side. The hole for the fixing screw will snap. That is the reason for the term “lock snapping”. With anti-snap cylinders the lock will snap in a way that does not compromise the lock’s security and keeps most of the lock in place making it harder to gain access.
We have a large range of fairly priced anti snap locks available with us at all times so contact us now to get a locksmith.
If you live in Wimbledon’s SW19, you know the vibe - gorgeous tree-lined streets, the buzz of the Wimbledon Tennis Championships, and the charm of the Village or Common just a short walk away. But between the stunning Victorian houses, sleek modern flats, and lively shops on the high street, there’s a catch: lockouts after a late night cheering at the All England Club or the odd break-in, in quieter spots can throw a wrench in your day. Even thing like moving homes or updating your home insurance can come with challenges. That’s when you need a local locksmith you can count on to sort things out fast. At SMS Locksmiths, we're proud to serve Wimbledon and the SW19 area (including Southfields, Merton Park, and Colliers Wood) with 24/7 emergency and planned services. Our DBS-checked, fully insured technicians arrive within 30 minutes, using non-destructive methods and transparent pricing - no hidden fees or call-out charges. Whether you're a homeowner securing your Edwardian semi-detached or a business owner in the Wimbledon Broadway retail hub, we're here to keep you safe. In this guide, we'll cover the top 5 locksmith services we provide to SW19 residents, tailored to local needs like upgrading heritage locks or handling post-match rush lockouts. Read on for practical tips, and remember: prevention is key to peace of mind. 1. Emergency Lock Opening: Back Inside in Minutes, No Damage to basic locks Nothing disrupts a Wimbledon evening stroll like realising you're locked out - keys forgotten after a coffee at Gail's or a tennis viewing party. Our lock opening service gets you back in fast using advanced pick-and-decode tools, bypassing tools and years of skill and experience, avoiding costly door damage. • Why Wimbledon residents love it: SW19's mix of old sash windows and modern uPVC doors means quick, non-destructive entry is essential. We handle everything from front doors to sheds and post boxes without a trace. • Real-life example: A local family in Southfields called us at 10 PM after misplacing keys during a dog walk on the Common. We arrived in 25 minutes, opened the lock in under 10, and advised on a spare key safe. • Pro tip: Always keep a copy of your keys with a family member or a person you trust, but call us immediately for lockouts - DIY attempts often lead to bigger bills. No matter the time, our 24/7 team ensures you're not stranded. Customer review: "SMS saved our night - professional and stress-free!" – Wimbledon Village resident (5 stars on Trustpilot). 2. Lock Changing: Fresh Security for New Starts in SW19 Moving into a charming Wimbledon flat or after losing keys? A lock change is your first line of defence against unknown access. We replace old locks with high-quality, British Standard (BS3621) compliant options that meet insurance requirements. • Tailored for Wimbledon: Many SW19 homes have outdated rim locks on period properties; we swap them for secure euro cylinders or deadbolts that fit seamlessly. • The process: On-site assessment (free quote), removal of old locks, installation (under 45 minutes), and a full test. Costs start from £110, with a 1-year warranty. • Local insight: With rising lettings in Merton Park, tenants often request changes post-move—we've helped dozens secure their new homes and flats without voiding deposits. Don't risk spare keys circulating; a quick change brings instant security. Book via our site for same-day service. 3. Lock Upgrades: Boost Protection Against Wimbledon Burglary Trends SW19 saw a spike in bike thefts and shed break-ins last year, per Merton Council reports. Our lock upgrades modernise your setup with anti-snap, anti-drill cylinders and multi-point systems, deterring thieves in high-traffic areas like Haydons Road. • SW19-specific benefits: Upgrade Victorian night latches to snap-resistant models or add 5 lever British standard deadlocks for Colliers Wood flats – we supply multiple brands for you to choose from on site. • Why upgrade now?: Standard locks fail 70% of tested break-ins; our BS-approved options slash that risk and keep premiums low. • Quick win: A Wimbledon Broadway shop owner upgraded their rear door after a near-miss; no incidents since, and they saved on insurance. We offer free security audits to spot weak points - perfect for families near the tennis grounds during tournament season. 4. New Lock Installations: Seamless Fits for Home or Business Renovating your Wimbledon townhouse or fitting out a new office near Plough Lane? Our lock installation service handles everything from single deadbolts to full master key systems for multi-unit properties. • Local expertise: We specialise in SW19's diverse builds -reinforced locks for ground-floor flats or heavy-duty ones for garage conversions in quiet Merton Park cul-de-sacs. • Step-by-step: Site visit for measurements, custom sourcing (e.g., thumb-turn cylinders for easy exit), professional fitting, and handover with keys and instructions. Most jobs completed in the first visit. • Business perk: For Wimbledon shops and cafes, we install mechanical digital access control for staff shifts, reducing downtime. Invest in lasting quality - our installations come with lifetime advice and no-fuss guarantees. 5. After-Burglary Services: Restore and Reinforce in SW19 A break-in is every homeowner's nightmare, and Wimbledon's green spaces can attract opportunists. Our after-burglary response includes immediate boarding-up, full lock replacements, and forensic-safe repairs to get you secure overnight. • Comprehensive support: We coordinate with police (providing reference numbers for claims), replace damaged frames, board up broken doors and windows to restore security providing you with peace of mind and giving you time to change doors. • Wimbledon focus: In areas like Southfields, where gardens back onto commons, we add perimeter advice like gravel paths for noise alerts. • From the frontlines: After a recent Merton burglary wave, we helped a family in SW19 board up, reinstall high-security locks, and claim via photos - back to normal in 24 hours. Act fast: Delaying repairs invites further risk. We're your second call after the police post-incident, with compassionate, efficient service. Why Choose SMS Locksmiths for Your Wimbledon SW19 Needs? As a family-run business with over a decade in South West London, we know SW19 inside out - from the rush of match days to the serenity of the Common. Our services aren't just fixes; they're tailored solutions with free quotes, 30-minute responses, and eco-friendly practices (we recycle old locks!). Plus, we're fully insured and DBS-vetted for your peace of mind. Ready to secure your Wimbledon home or business? Visit smslocksmith.co.uk to book online or request a free security check. For emergencies, we're just a click away - no postcode too far in SW19! Stay safe, Wimbledon - SMS Locksmiths has your back. #WimbledonLocksmith #SW19Security #EmergencyLocksmith #LockChangeWimbledon #MertonLocksmith ________________________________________ FAQs for SW19 Residents: Q: How quickly can you arrive in Wimbledon? A: Typically 20-30 minutes, 24/7 - no exceptions for rush hour on the A3! Q: Are your services insured for SW19 properties? A: Yes, all work is given a 1 year warranty and compliant with UK standards. Q: What's the cost for a basic lock change in Wimbledon? A: From £110, with no surprises - get a quote today. For more security tips, check our blog or follow us on social for Wimbledon updates!
Below is a more detailed breakdown of each service, which you can place under “Locksmith services we provide in Hounslow”: Lock Changes & Upgrades
 If you’ve just moved into a new home or want to increase your security, we can replace your locks with better, more secure models. Whether it’s euro cylinders, mortice locks, deadbolts or master key systems, we can recommend and install insurance-grade products. Lock Repair & Adjustment Locks wear out over time - maybe the key sticks or you force it to turn. We diagnose whether parts can be repaired (springs, levers, cylinders) or whether it requires replacement. We can also realign misaligned mechanisms so things work smoothly again. Emergency Lockout / Non-Destructive Entry Locked out at an inconvenient hour? We specialize in non-destructive entry, meaning we’ll open your door without breaking it. We carry a full set of specialised tools, from lock picks to tensioners, to gain entry safely and professionally. Burglary & Forced Entry Repair If your property has been broken into, we can repair or replace damaged locks, door frames, or hinges. We can also strengthen weak points and offer recommendations to prevent future incidents (e.g. reinforced strike plates, heavy-duty cylinders). Door & Frame Carpentry / Refurbishment Sometimes the door frame, jamb or door edge is also damaged or poorly aligned. We can carry out carpentry, reinforce the frame, repair door edges, or adjust the door fitting so your locks work properly. UPVC / Multi-Point Door & Window Mechanisms UPVC doors and windows often have multipoint locking systems that require delicate handling. We service, repair, or replace gearboxes, locking rods, handles, and cylinders. We can also realign or replace stuck mechanisms so your windows and doors seal properly. Commercial & Business Services For offices, shops, and commercial premises, we offer: Master key systems Restricted key zones Keyholding & emergency access Panic bars, exit devices, and high-security door furniture Mechanical Digital keypad / access control installations Lock re-keying when staff changeover occurs Area Coverage & Availability We cover the TW3 area and nearby zones in Hounslow, including Feltham, Heston, Cranford, and West Drayton. Wherever you are in Hounslow, we strive to reach you fast. We operate 24/7, every day. Even during weekends and bank holidays, we remain on call.
